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Simplifying x2 + -9 = (x + 3) Reorder the terms: -9 + x2 = (x + 3) Reorder the terms: -9 + x2 = (3 + x) Remove parenthesis around (3 + x) -9 + x2 = 3 + x Solving -9 + x2 = 3 + x Solving for variable 'x'. Reorder the terms: -9 + -3 + -1x + x2 = 3 + x + -3 + -1x Combine like terms: -9 + -3 = -12 -12 + -1x + x2 = 3 + x + -3 + -1x Reorder the terms: -12 + -1x + x2 = 3 + -3 + x + -1x Combine like terms: 3 + -3 = 0 -12 + -1x + x2 = 0 + x + -1x -12 + -1x + x2 = x + -1x Combine like terms: x + -1x = 0 -12 + -1x + x2 = 0 Factor a trinomial. (-3 + -1x)(4 + -1x) = 0Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {-3, 4}
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